Running a science STEM polytunnel offers a hands-on, controlled environment for students to investigate biology, ecology, and environmental science while developing engineering skills.
Key aspects involve utilising the structure to manage microclimates for year-round growing, conducting experiments on plant growth factors, and implementing technology for monitoring.
My video series will enable you to make a cheap poly much more stable and rigid. Finally a lot more productive and fun. You can use the DT part of the school to make things happen.
Core STEM Educational Activities
- Plant Biology & Ecology: Students can study plant life cycles, photosynthesis, and respiration. Activities include growing plants from seeds, observing growth in different conditions, and investigating transpiration.
- Environmental Science & Climate: The polytunnel acts as a living laboratory to study the greenhouse effect, humidity, and temperature regulation. Experiments can focus on the impact of, say, using a “no-dig” vs. traditional soil method on soil biodiversity.
- Engineering Design: Students can design and build supporting structures like shelving (e.g., “floating shelves” for seedlings), raised beds, or irrigation systems.
- Technology & Data Collection: Incorporating data logging for temperature and humidity, setting up rain-fed irrigation with water tanks, or using solar panels for automated, low-energy watering systems.
- Mathematics: Students can measure, record, and analyze plant growth data, calculating yields.
Operational & Maintenance Considerations
- Structure Security: Ensure the polytunnel is properly anchored, especially in areas with high winds.
- Ventilation: Regular ventilation is critical in hot weather to prevent excessive heat and humidity.
- Watering and Care: Implement consistent, but not excessive, watering, often using soaker hoses to conserve water.
- Crop Management: Practice crop rotation and “no-dig” methods, adding compost annually, to manage soil health.
- Season Extension: Utilize the structure to start plants early in spring, grow crops through the winter (e.g., salad greens, brassicas), and cultivate warm-weather crops like tomatoes or cucumbers in summer.
- Safety: Ensure the area is safe for children, removing trip hazards and sharp edges.
Example STEM Project Ideas
- “Fair Test” Experiment: Growing seedlings in different types of soil or with varying levels of nutrients.
- Water Transport Study: Using coloured water to show how water travels up plant stems.
- Biodiversity Monitoring: Creating a monthly log of insects and wildlife found within the polytunnel area.
- Vertical Farming Trial: Investigating how different types of light, possibly using LEDs, affect the growth of seedlings before they are planted.
- Microgreen Production: Growing micro-vegetables in trays to teach about rapid growth cycles.
